Daniel Choleva
Frontend / Fullstack Engineer · Ostrava, Czechia
Passionate software engineer building and optimizing web applications since 2019. From rewriting legacy systems at Stora Enso to shipping betting features at Betsys, I'm constantly seeking new challenges and meaningful projects to level up on.
- CLASS
- Frontend / Fullstack
- GUILD
- Betsys
- BASE
- Ostrava, CZ
- MAINSPEC
- Angular / React / TypeScript
- OFFSPEC
- C# / Java / Go / SQL
- Sport
- Gaming
- Traveling
- 3D printing
Class swap
Swapped into a Java project with zero prior experience and shipped features within few weeks.
Solo Leveling
Built and launched freelance promo websites from first commit to deployment.
Academic ribbon
Earned a Bachelor’s degree in Computer Science from VŠB – Technical University of Ostrava.
Mixed class player
Delivered production features across Angular, React, TypeScript, Java, C#, and SQL.
Class swap
Solo Leveling
Academic ribbon
Mixed class playerLVL 6 · 2024 — present
Frontend / Backend Engineer — Retail project
Betsys · Remote (Prague / Katowice)
Delivered the proof-of-concept for retail betting screens and became the main developer maintaining the MiniSSBT application, collaborating with colleagues in Croatia.
- Angular
- React
- NestJS
- TypeScript
LVL 5 · 2023 — 2024
Frontend Engineer — RWD project
Betsys · Remote (Prague / Katowice)
Shipped new features for the ticket part of an online betting platform, working closely with a UX designer — most features landed with positive user feedback.
- Angular
- NgRx
- Nx
LVL 4 · 2022 — 2023
Fullstack Engineer — Firm360
3Pillar Global · Ostrava
Built an accounting solution for individuals, companies and accounting firms — two frontends on a shared backend. Picked up Java from scratch in three weeks to join the team.
- Java
- Spring Boot
- Angular
- MySQL
- Stripe
LVL 3 · 2021 — 2022
Frontend Engineer — CaptiveAire Systems
3Pillar Global · Ostrava
Developed a PWA and a desktop app for managing integrated HVAC hardware, while migrating the main application from AngularJS to modern Angular with both versions live.
- Angular
- Angular Material
- C#/.NET
LVL 2 · 2019 — 2021
.NET / AngularJS Engineer — WPS project
Stora Enso Wood Products · Ostrava
Rewrote a production system from an old architecture to a new one — less boilerplate, faster deployments, more readable code. Part-time during university studies.
- C#/.NET
- AngularJS
- MSSQL
- PL/SQL
- TFS
LVL 1 · 2018 — 2019
IT Specialist & Technical Corrector
NITTA Systems · Ostrava
Supported an image-processing project and managed hardware and software maintenance.
- Linux
2023
Zápisník z Cesty (opens in new tab)
Promo site for my wife's published travel diary — a playground for webhooks, Stripe payments and email notifications.
- Next.js
- Stripe.js
- TypeScript
2022 — 2023
Tereza Škorupová — psychologist (opens in new tab)
Statically generated site with a headless CMS, scoring 90–100 in Lighthouse. There's an easter egg hidden inside.
- Next.js
- Sanity
- Netlify
2021
Reality Žáčková (opens in new tab)
Real-estate broker site designed in Figma and built on the frontend by me — my first run with Tailwind.
- Tailwind
- Figma
- HTML
- CSS
2020
Autodoprava Choleva (opens in new tab)
Informational website for a road-transport company and my first freelance Angular project.
- Angular
- Netlify
Languages
- TypeScript
- JavaScript
- C#
- Java
- SQL
- HTML
- CSS/SASS
Frontend
- Angular
- React
- Next.js
- RxJS
- NgRx
- Nx
- Tailwind CSS
- Angular Material
Backend
- NestJS
- .NET
- Java
- MSSQL
- MySQL
Tools & Services
- Git
- Figma
- Sanity
- Stripe
- Netlify